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Polyurethane Sheets, Rod & Polyurethane Casting

Polyurethane Elastomers

Polyurethane Elastomers are extremely versatile materials and this has been the key to their widespread applications. This flexible engineering material is available in Polyurethane Sheet, Rod and Custom Cast Products. Polyurethane has a unique design and construction combining many of the advantages of rigid plastics, metals and ceramics with the extensibility of rubber.

Dotmar has a modern Polyurethane Sheet casting facility with the ability to cast polyurethane parts to a near net shape and then post machine according to your requirements.

There are many different types of Polyurethanes Sheet, Polyurethane Rod and Polyurethane Custom Cast Component Materials. The four basic types are;

  • POLYETHER / TDI
  • POLYETHER / MDI
  • POLYESTER / TDI
  • POLYESTER / MDI

As a general guide to Polyurethane:

  • Polyethers are recommended for applications were parts undergo dynamic stress. ie. They incur lower heat build-up. They also have advantages in resilience, low temperature performance and resistance to water attack (hydrolysis). Polyethers also have lower viscosity and specific gravity.
  • Polyester based urethanes have superior cut, tear, abrasion, oil and solvent resistance.
  • MDI based products have lower isocyanate odour than similar TDI types and have superior hydrolysis resistance and higher resilience.
  • TDI based products are less sensitive to moisture, have shorter demould times and lower cure temperature requirements compared to MDI types.

Properties of Polyurethane:

Polyurethane can be adapted to comprise a wide range of unique properties, which is a key factor of its versatility.

  • Abrasion resistance
  • Toughness – Tensile strength
  • High load bearing ability
  • High tear resistance
  • Mechanical properties
  • Resistance to water, oil, grease
  • Electrical properties
  • Corrosion resistance
  • Colour range
  • Cost effectiveness (when long service life of PU parts are taken into account)

More information on our Polyurethane Products:

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Polyurethane

Polyurethane Casting